package lt.startup.duobes;
import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;

public class MyLocation {
    Timer timer1;
    LocationManager lm;
    LocationResult locationResult;
    private boolean gps_enabled = false;
    private boolean network_enabled = false;
    private boolean continueRefresh = false;
    
    public void setRefreshing(boolean refresh){
    	continueRefresh = refresh;
    }
    
    public boolean getGPSLocation(Context context, LocationResult result){
    	locationResult=result;
        continueRefresh = true;
        if(lm==null)
            lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
      
        if(!gps_enabled){
            result.gotLocation(null);
        	return false;
        }    
        if(gps_enabled)
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);       
        return true;
    }
    
    
    
    public boolean getLocation(Context context, LocationResult result, long minTime, float minDistance)
    {
        //I use LocationResult callback class to pass location value from MyLocation to user code.
        locationResult=result;
        if(lm==null)
            lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

        //exceptions will be thrown if provider is not permitted.
        try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
        try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}

        //don't start listeners if no provider is enabled
        if(!gps_enabled && !network_enabled){
            result.gotLocation(null);
        	return false;
        }    

        if(gps_enabled)
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, minTime, minDistance, locationListenerGps);
        else if(network_enabled)
            lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, minTime, minDistance, locationListenerNetwork);
             
        timer1=new Timer();
        timer1.schedule(new GetLastLocation(), 20000);
        
        return true;
    }
    
    
    public boolean getLocation(Context context, LocationResult result)
    {
        return this.getLocation(context, result, 0, 0);
    }
    
    public boolean getLocationFast(Context context, LocationResult result) {
    	locationResult=result;
        if(lm==null)
            lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

        //exceptions will be thrown if provider is not permitted.
        try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
        try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}

        //don't start listeners if no provider is enabled
        if(!gps_enabled && !network_enabled) {
            result.gotLocation(null);
        	return false;
        }    
        
        Location net_loc = null, gps_loc = null;
        if(gps_enabled)
            gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        if(network_enabled)
            net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

        //if there are both values use the latest one
        if(gps_loc!=null && net_loc!=null){
            if(gps_loc.getTime()>net_loc.getTime())
                locationResult.gotLocation(gps_loc);
            else
                locationResult.gotLocation(net_loc);
            return true;
        }

        if(gps_loc!=null){
            locationResult.gotLocation(gps_loc);
            return true;
        }
        if(net_loc!=null){
            locationResult.gotLocation(net_loc);
            return true;
        }
        locationResult.gotLocation(null);       
        return false;
    }
    
    public boolean isLocatingEnabled(){    	
    	try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
        try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}    	
    	return gps_enabled || network_enabled;
    }
    
    

    LocationListener locationListenerGps = new LocationListener() {
        public void onLocationChanged(Location location) {
        	timer1.cancel();
        	if (!continueRefresh){        		
        		lm.removeUpdates(this);
                lm.removeUpdates(locationListenerNetwork);
        	}
            locationResult.gotLocation(location);            
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    LocationListener locationListenerNetwork = new LocationListener() {
        public void onLocationChanged(Location location) {
        	timer1.cancel();
        	if (!continueRefresh) {        		
        		lm.removeUpdates(this);
                lm.removeUpdates(locationListenerGps);
        	}
            locationResult.gotLocation(location);            
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    class GetLastLocation extends TimerTask {
        @Override
        public void run() {
        	if (!continueRefresh){
        		lm.removeUpdates(locationListenerGps);
        		lm.removeUpdates(locationListenerNetwork);
        	}
             Location net_loc=null, gps_loc=null;
             if(gps_enabled)
                 gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
             if(network_enabled)
                 net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

             //if there are both values use the latest one
             if(gps_loc!=null && net_loc!=null){
                 if(gps_loc.getTime()>net_loc.getTime())
                     locationResult.gotLocation(gps_loc);
                 else
                     locationResult.gotLocation(net_loc);
                 return;
             }

             if(gps_loc!=null){
                 locationResult.gotLocation(gps_loc);
                 return;
             }
             if(net_loc!=null){
                 locationResult.gotLocation(net_loc);
                 return;
             }
             locationResult.gotLocation(null);
        }
    }    
    

    public static abstract class LocationResult{
        public abstract void gotLocation(Location location);		
    }
    
    public void stopLocating(){
    	try {
    		 lm.removeUpdates(locationListenerGps);
             lm.removeUpdates(locationListenerNetwork);
    	} catch (Exception e) {}
    }
}